Starting-box.



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M. TAIGMAN.

STARTING BOX.

APPLICATION FILED APR. 9, 1914.

Patented June 29, 1915.

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WITNESSES a ATTORNEYS M. TA'IGMAN.

STARTING BOX.

APPLICATION man APR. 9, 1914. 1,144,876; Patented June 29, 1915.

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M. TAIGMAN.

STARTING BOX.

APPLICATION FILED APR. 9, 1914.

1,144,876. Patented June 29, 1915.

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WUWESSES l/VVE/VTUR -M ax Bagrriozn M. TAIGMAN.

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APPLICATION FILED APR. 9, .1914.

Patented June 29, 1915.

llVl/E/VTOI? a mom A TTOR/VEYS Max Ton By W M. TAIGMAN.

STARTING BOX.

APPLICATION FILED APR 9, 1914- 1,144,876. I I Patel med June 29, 1915.

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' pnri'mu (WINN- mu m WITNESSES v T /NVENTUR Max 01 ig me: n r 2 By M wk ATTORNEYS so i switch forcontrolling v hcnformity with the operation of the box,

MAX TAIG-MAN, OF NEW YORK, N. Y.

STARTING-BOX.

Specification of Letters Patent.

Application filed Aiun 9, 191-4. Serial 110. 830,675. I e

T all whom it may concern:

Be it known that I, MAX zen of the United States, and a resident of the city of New York, borough of Manhat- Drawings.Figure of a box constructed and arranged 1n 1 ac-' .tan, in the county and State of New York, have invented a new and Improved Starting-Box, of which the following is a full, clear, and exact description.

Among the principal objects which the present invention has in view are: to provide an apparatus of the character mentioned with a series of interchangeable unit devices to obviate the need for structural alteration in the apparatus when replacing a member thereof; to v provide a relatively cheap circuit-breaking element to avoid arcing between the starting arm and resistance terminals of the box; to provide a simplified construction for the starting arm employed in the present box; to complete the circuit controlled by the box by placing the elements of the box in service position; and to provide simple and accessible adjustments for the. moving operative membersof the apparatus above mentioned. 1

1 is an end elevation cordance with the present invention, showmg in conjunction therewith a motor brake lever, a manipulating connection for said box, and a brake wheel or pulley to be-0perated on'by saidI brake lever; Fig. 2 is a front elevation of the same, the brake wheel, being omitted; Fig. 3 is a side elevation of a box constructed and arranged in accordance with the present invention, the cover ofsaid boxbeing removed; Fig. 4 is a rear view of the same, the back of the box being 're- -moved; Fig. 5 is a horizontal cross section taken as on the line 5-5 in Fig. 3; Fig. 6 is a horizontal section taken as on the line 6-6 in. Fig. 3; Fig. 7 is a vertical cross section taken on the line 77 in Fi 3; Fig. 8 is a detail view in perspective 0 thennit resistance s ool and terminal block connected therewith; Fig. 9 is a detail View in erspoctive of the terminal block; Fig. 10 1s a detail view in perspective, showin on an enlarged scale one of the terminal uttons; Fig. 11 is a detail view in'perstp'gctive, showourrent in and a jumper or circuit-connector,normally TAIGMAN, a minattached to the box cover; Fig. 12 is a deta1l view in perspective, showing a cover Patented June 29, 1915-.

for the box having the jumper bar disclosed in the previous figure, attached thereto;

' Fig. 13 is a detailview, in section, of a fragment of the starting lever with which the box is provided, showing in conjunction therewith a cross section of the switch rocker bar; Fig. 14 is a lay-out of the wiring employed in the starting. box, showing in conjunction therewith the jumper bar or circuit-connector normally attached to the cover; Fig. 15 is a front elevation of a box constructed and arranged in accordance with a modified form of the invention, the resistance spool, terminal block and parts connected therewith, and the cover of said box being omitted; Fig. 16 is a rear elevation of the same, showing the cover in position, the back of the box being omitted; Fig. 17 is a vertical cross section taken on the line 17 17 in Fig. 16; Fig. 18 is a detail view in perspective of the box employed in the modified form shown in Figs. 15 to 17 inclusive.

Descripti0n.The starting box and attachments shown in the drawings as connected therewith, are preferably employed in conjunction with electric motors having driving attachments and brake pulleys such as indicated by the numeral 25 in Fig. 1 of the drawings. A suitable brake shoe 26 is provided atthe end of a brake beam or lever 27, which lever is pivoted on a bolt 28, and is provided with a reduced end 29 which extends through an eyelet 30 in the exposed end of a switch arm 31 of .the improved starting box herein described. The pivot bolt 28 is fixedly mountedin the end of a rocking supporting arm 32. The arm 32 is pivotedon a bolt 33 extending from the frame of the starting box, and is adjustedas to working position by a screw bolt 34 operatively mounted in a bracket extension 35. The arm 31 and the lever 27 are coin cidentally manipulated by' a transmission connector 36, which is conveniently attached to a foot treadle or other manually manipulated device and engages the arm 31 by; means of an eyelet 38 formed therein. Said arm, lever, and 'parts, connected therewith are normally held in the out-of-service position by a spring 37, which is nected with the arm 31.

The box above referred to has a continuous skeleton side frame 39. The fraine 39 has a removable cover 40 and a removable back .41. \Vhen the cover and back above mentioned are removed, the device held in the skeleton frame may be engaged or handled from both sides. To support. a resistance unit w1t h which the box is supplied, theframe-39 s provided with inwardly-extending brackets 42, having tapped perforations to recelve screw bolts 43. When-the box is constructed in accordance with the preferred form of the invention, brackets 44 and 45 are employed, to which said stationary member of said switch is rigidly secured by screw bolts 46. In service, the box is suspended by legs 47 the preferred installation for the box being that wherein said box is. suspended from the under side of a work-bench or shelf.

The resistance unit, as shown best in Fig. 8, comprises a spool 48, which is referably consti noted of a hollow, p'orce ain tube wrapped with suitable resistance Wire, 1n

electrical contact with which are mounted" the metal bands 49, seen in said figure of the drawings. The bands are drawn tightly on the coil, by screws .50, which screws pass between ear tabs on the ends of the bands, grasping between said ends the ter minals of jumper straps 51. Before the straps 51 are installed, the spool 48 iscapped by placingover each end thereofhe capportions '52 of side frames 53. The cap po rtions 52 are-each provided with an exterl nally-openingwell154, said wells beingdeep enough to contain nuts 55, whichare fitted to the screw-threaded ends of clamping bolts 56, The frames 53 are provlded wlth inwardly-projecting guide lugs 5'1 and 58;

' the bolts 43. Said'lugs 57 and 58 serve as- The lugs 58 are each provided with an inwardly "edge-opening slot 59 suflic ently wide to permit the passage therethrough of guides to hold an insulating panel 60, which.

is provided with elongated perforations 61, also sufiicientlywide 'to receive the bolts 43. The perforations 61 and the slots 59 are alined, and are elongated in the man-- -ner shown in the 'drawlngs and as above de-' scribed, to permit an adjustment of the side frames 53 to the panel 60 and the-spool 48, when assembling the unit.' The panel 60 is preferably made" of porcelain, and the perforations 61 and holes 62: formed therein are molded or cast in the anel, to avoid subsequent boring or mac iningof the panel. Through the holes 62"are extended the ends of small screw bolts 63, which are held rigidly in positienbyn'uts 64. Under the nuts 64 are disposed washers, which subsequently form seats whereon rest the lower edgesof terminal buttons 68'. Under directly com I the heads of the bolts 63, at the back of the panel 60, are washers 67, under which are shelf. of a storeor-warehouse in its fully operative, and, if necessary, tested condition. When installed in servlce, the conmotor- 69 is electricallyconnected to. the button most suited. to the conditions of service, the-preferred form of connections being to extend the terminal end oi-said connector under a washer 67. The connector69 is suitably mounted on 'thebinding post 7 0' with which the box is furnished.

' From the foregoing, it. will be seen that the necessary electrical connections or alterations thereof ma'y be conveniently and exy removin the back 41 of the box, which exposes the. ack of the panel 60 and screws 63 thereof which hold the connector 69 and the jumper straps 51, as seenbest inFig. 4 of-the drawings. y r

The binding. post 70 is electrically connected with'one leg of an electric circuit, and {With the buttons 66' through more or less of ther'esistance coil on the spool 48. .The other binding, post, 71, is electrically connected with the opposite leg of the electric circuit and with a pencil brush 72, which normally rests upon one or other of said buttons to slide thereover. The pencil brush 72'is slidably mounted in a head 73, best seen in Fig. 5 of the drawings, which head is' at the end or the extension (4 on the 31.- The extension 74 is supported by. but electrically insulated from, the arm 31 by an insulator pad 75. Said extension and editiously 'efi'e'cted in the-manner indicated,

arm are structurally connected by screws 79 mounted. on the extension 74 at one end thereof. Current is delivered to the plungem78 from the bar 80"when the head 81 is engagedby the head 82 of a rocker 83. The

rocker 88;.is-supported on-a knife-edge 85,

the frameliaving which, is structurally connected with, but insulated from the bar 80 aia aae by meansof a :pad 84. At each side of the knife-edge 85 are guide uprights 86. "The buttons 66, 102 and 103, I provide set screws .105, which enga e tapped holes in the frame rocker 83 is provided at op. osite sides with recesses 87, provided to mfold said uprig'hts,and thereby locate the operating po- The plunger 78 :is pressed uponthe rocker 83 by one 'of thesition of said rocker.

springs 77. To prevent any drag of the plunger 78 on the rocker 83., there is .provided a roller88, to facilitate theo ation of'which the rocker 83 is furnishe with a relatively short runway or path '89, as best shown in Fig-11 of'the drawings. At one end of the bar 80 is provided a-spring clip 90, between the jaws of which one end of a jumper-bar 91 extends. The opposite end I of said jumper-bar enters the jaws of a clip 92, which clip is fashioned at the end of a rectangular frame 93, said frame being rigidly secured upon, but insulated from the frame 39 of the box. The frame 93 is electrically connected with the binding post 71, and thus forms what may be termed the one terminal of the electric circuit entering the starting box.

The jumper-bar 91 is mounted on the front cover 40 of the starting box. The jumper-bar is constructed from any suitable material, and is secured by means of screws 91 to the legs 95 of a plate 96. The plate 7 96-is furnished With edge opening slots 97, which, in the assemblage of the elements, engage screws 98, by which the plate is rigidly secured to the cover 40. The plate '96 and parts connectedtherewith are insulated from the-cover 40 by a pad 99, as best seen in Fig.12 of the drawings. The cover 40is held in service position by a dowel hook pin 100, and by a spring latch 101. When the latch 101 snaps into hol'ding position, the ends of the bar 91 have been forced between the jaws of the clips 90 and 92, and the working electric circuit for the control of which the box is designed, is

completed or delivered on one side to the head 82 of the rocker 83, and on the other side to the buttons 66.

In the normal or inactive condition of the apparatus, the switch-arm 31 and extension 74 are moved by a spring 37 to a position where the pencil brush 72 rests on a dead button 102. The button 103 may be denominated as an auxiliary button, being dead under certain conditions; forming the first of the series of live buttons under other conditions; while under other conditions it is employed as a live shunt button, when the box is employed as a starter for a shunt-wound motor. veniently arranged in accordance withthe present invention by connecting the button 103 by means of a' jumper 104, with the adjacent live button 66. This winding and connection are conventional, and. it is not considered necessary 'to further describe This is most conthem in this-connection. To adjust the throw of the .arm 31 .with reference to the are loose and are covered by a leather pad 107. The pad 107 is employed primarily to vdeaden the sound which would be produoed by the shoulders 108 striking the ,plate and pad when moved quickly to the out-o f -service position, by the spring 37, or as qu ckly moved by the operator when depressing the end of the arm 31 attached to the connector .36.

When employing the modified construction shown in Figs. 15 to-l8 inclusive, the

switch having the rocker 83, the bar 80, the plunger78, and parts connected therewith, is replaced by the elongated saddle spring 109, one 'endwhereof is held rigidly under the foot of the terminal "110. Interposed =between=theframe of the box and the spring 109 is an insulating pad 111. To

'operatively engage the spring 109, the arm 31 is provided with a plate 112, at the end of which is extended a finger 113. Said finger has a pathof movement concentric with the pivot post 68, to accommodate which is the office of the spring 109.

A spring bracket terminal 114: is disposed in corresponding relation to the terminal 110, and'at. the opposite side of the box the terminal 114 is electrically connected withthe binding post 71. The two terminals are connected 1n service by a spring metal jumper 115, which, as shown best in Figs.

17 and 18 of the drawings, is rigidly mounted on the cover 40 by a single screw 116. The jumper 115 is insulated from the "cover 10-loy a pad 117. Said pad is upturned at the sides,to be interposed between the umper 115 and the spotting ridges 118 with which said cover is provided.

In the modified construction of the switch arm 31, as shown in Figs. 15 to 17 inclusive, the plate 112 is electrically connected to the extension 74 by screws 119. Both said extension and sand plate are insulated fromthe arm 31 by the insulating pads 75 and 120. Also it will be noted in the modified construction, one only of the springs 77 is employed-that which depresses the pencil brush 72. An important factor in the present invention is, as pointed out, the facility for assemblage afforded by the unit con;

struction of the combined elements constituting the box. When the box and units are constructed as described the assembling is accomplished as follows: The resistance unit is placed within'the frame 39, and the screw bolts 43 are passed through the slots 59 and perforations 61 and screwed 'upon the brackets 42, said bolts extending through said brackets to pass through the back 41 of the box, to be engaged by screw nuts r0- vided to hold said back in position. the resistance unit is equipped with the connector 69, the loose end of said connector is engaged with the binding post 70. This operation completes the-assemblage as far as the resistance units are concerned. The switch unit, parts whereof are shown in Fig. 11, is then introduced into the box. The screw bolts 46 passing through the brackets 44 and serve to hold the stationary element or bar 80. When the rocker 83 is dropped into position to rest on the knife-edge 85 and the pad 121 to receive which the upturned edge 122 is provided, the switch unit 1s completely installed, the clip 90 being located in line with the clip 92, the latter of'which may be regarded as a structural element of the frame 39, being permanently attached thereto, as are the binding posts 70, 71 and 123.

- The next step in the assemblage is to adjust the arm 31 upon the post 68, which is thereafter held in this position by a cotter. pin 124. The plunger 78, if structurally separated from the extension 74 of the switch arm, is placed in position with the collar 79 prior to setting the arm 31 on the'post 68. .The spring 77 thereafter holds said plunger in operative relation. The pencil brushes 72,- as in the conventional construction, are,

placed in operative position as a complete act of the installation, and not as an act of assemblage. To insert a pencil brush 72, it requires only that the spring 77 shall be lifted to permit the introduction of the pencil into the head 73 under the spring 77.

The spring 37 is now mounted to swing the pencil-provided end of the arm 31 over the dead button 102. If the installation calls for a shunt-circuit, the jumper 104: is placed under the washers 67 connected with the button 103 and the adjacent button- 66. The connector 125 is now united with the binding post 123, which completes the assemblage. 'The operating current is completed within the box by the cover40, and by the jumpers 91 and 115. Said jumpers are held in contact with the clips 90 and 92 and with the terminals 110 and .114, respectively, only when in closed position on the box, in which position they are held by the latch 101.

When using the preferred form of the construction, the operation is as follows;

Power being exerted through the transmission-connector 36, the arm. 31 is rocked on the post 68 to move the pencil 72 from the button 102 toward the opposite end ofth'e series of buttons. The plunger 79 is carried over the rocker 83 in'unison with the movement of the pencil. The adjustment is such that the pencil brush 72 is electrically established in contact with the button 103 prior to the tip ing of the; rocker 83 which moves the bait 82 thereof to engage the 'head 81-on the ba-r:80. Thus the operatlve current is established, first through the shunt heads 81 and 82 prior to the pencil 72 leaving the button 103. Hence, when the pencil 72 does leave the button 103, no arcing ensuesat this point; The arcing due to the break of the current is formed between the heads 81 and 82, and may in service destroy or otherwise impair these heads. It is for .this reason that the head 82 is secured to the bar 80 by a'screw-126, and is held rigidly on said bar by side flanges 127, with which said head is provided. It will be seen that when the need arises to replace the head 81, this may be accomplished without removing the bar 80, by releasing the screw 126 to lift the head 81 from the bar 80 to make room for a new head. If the head 82 is impaired, the rocker 83 is lifted from the knife-edge 85 and replaced by a new rocker.

It will be noted that the starting box above described, and as shown in the accompanying drawings, makes for simplicity of cuit terminal; and a cover for said body,

adapted to connect the terminal of said switch and the other of said main terminals.

2. An apparatus ascharacterized, having a box-like body; a plurality of main circuit terminals mounted onsaid body; a rheostat embodying coil section terminals, electrically connected with one of said circuit terminals;

a switch movable over said section terminals; means for electrically connecting said switch and the other of said terminals; and a cover for said body for, actuating said means to so connect said switch and terminal when said cover is actively disposed.

3. An apparatus as characterized, having a box-like body; a plurality of electric main terminals; a rheostat electrically connected with one of said terminals; a switch for said rheostat; a cover for said body; and means fixedl connected with said cover for electrical? connecting said switch andthe other of said terminals when said cover is closed on. said body. a

rai e.

a said cover in closed position.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

MAX TAIGMAN. Witnesses E. F. MURDOCK, PHILIP D. ROLLHAUS. 

